基于双偶极子模型的水下航行体尾迹内波仿真方法

A Simulation Method for Underwater Vehicle Wake Internal Wave Based on Double Dipole Model

针对航行体螺旋桨效应激发尾迹内波效应,从等效质量源模型角度出发,建立双偶极子模型,融合水下自主运动航行体体积正对称效应和螺旋桨尾迹反对称效应,得到接近真实航行体运动激发内波及尾迹的波形结构。通过计算,得出不同模态随速度的变化规律、不同模态波动结构以及明显的非对称结构,仿真计算结果与实测实验结果基本一致,该模型可用于模拟真实螺旋桨效应,为进一步研究水下航行体内波运动规律及水动力学现象提供依据和支撑。

Aiming at wake internal wave excited by the effect of underwater vehicle propeller,from the point of an equivalent mass source method,the double dipole model is established to simulate the superposition of the positive symmetry effect on the vol⁃ume of underwater vehicle and the anti-symmetric effect of propeller wakes,and the waveform structure of the wake induced by the motion of real vehicle is obtained.This model can acquire different wave mode changing with the speed,the different modal wave structure and obvious asymmetric structure by computation.The calculation results with the measured results are basically identical.This model can be used to simulate the real effect of propeller and support further research for underwater navigation body wave mo⁃tion and the hydrodynamic phenomena.